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15. Simplify the expression cos (r)+cos²(r) tan²(r); (hint: you may write the expression in terms of sine and cosine only, then simplify).

15. Simplify the expression cos (r)+cos²(r) tan²(r); (hint: you may write the expression in terms of sine and cosine only, then simplify).

Trigonometry (11th Edition)
Trigonometry (11th Edition)
11th Edition
ISBN:9780134217437
Author:Margaret L. Lial, John Hornsby, David I. Schneider, Callie Daniels
Publisher:Margaret L. Lial, John Hornsby, David I. Schneider, Callie Daniels
Chapter1: Trigonometric Functions
Section: Chapter Questions
Problem 1RE: 1. Give the measures of the complement and the supplement of an angle measuring 35°.
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15. Simplify the expression cos (r)+cos²(x) tan²(x); (hint: you may write the expression in terms of sine and cosine only, then simplify). i) 1 ii) 2 iii) cot2(r) iv) not listed
Transcribed Image Text:15. Simplify the expression cos (r)+cos²(x) tan²(x); (hint: you may write the expression in terms of sine and cosine only, then simplify). i) 1 ii) 2 iii) cot2(r) iv) not listed
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